Patent US2897411A successfully refreshed from Google Patents.
US4129129A
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Venous return catheter and a method of using the same
Assignee: 3M Co
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Filing: 1977-03-18
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Granted: 1978-12-12
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Expires: 1997-03-18
Abstract
Abstract A method and device for connecting a life support machine to the heart of a patient during open heart surgery which includes a two-stage venous return catheter having spaced inlet openings in the tip end and spaced from the tip end to insure proper connection to the various cavities of the heart and adequate return flow for a life support machine.
Inventors
- 👤 Bruce A. Amrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:01
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/007; A61M1/00; A61M1/36; A61M1/3621; A61M1/3653; A61M1/3659; A61M25/0021; A61M25/0023; A61M25/0026; A61M25/003; A61M2025/0031; A61M2025/0073
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
In a method of by-passing blood flow from the heart during open heart surgery, those steps which comprise: (a) introducing a venous return catheter into the right atrium of the heart and extending the catheter into the inferior vena cava, (b) providing first drainage openings in the catheter adjacent the end of the catheter in the inferior vena cava, (c) providing second drainage openings in the catheter spaced from the end to lie in the right atrium, and utilizing a single tube in the catheter to carry the blood flow from the inferior vena cava and the right atrium to extracorporeal life support equipment.
Claim 2
Dependent Claim
104 words
In a method of by-passing blood flow from the heart during open heart surgery, those steps which comprise: (a) introducing a venous return catheter into the right atrium of the heart and extending the catheter into the inferior vena cava, (b) providing first drainage openings in the catheter adjacent the end of the catheter in the inferior vena cava, (c) providing second drainage openings in the catheter spaced from the end to lie in the right atrium, and utilizing a single tube in the catheter to carry the blood flow from the inferior vena cava and the right atrium to extracorporeal life support equipment.
Claim 3
Dependent Claim
48 words
A method as defined in claim 1 in which a tubular obturator is inserted into said catheter to the first drainage openings to block the second drainage openings during initial insertion of the catheter, and removing the obturator after the second drainage openings have entered the right atrium.
Claim 4
Dependent Claim
124 words
In a method of by-passing blood flow from the heart during open heart surgery, those steps which comprise: (a) circumferentially suturing the right atrial appendage, (b) surgically entering the right atrial appendage, (c) releasing the suture and inserting a venous return catheter into the right atrium of the heart and extending the catheter into the inferior vena cava, (d) providing first drainage openings in the catheter adjacent the end of the catheter in the inferior vena cava, (e) providing second drainage openings in the catheter spaced from the end to lie in the right atrium, and (f) utilizing a single tube in the catheter to carry the blood flow from the inferior vena cava and the right to atrium to extracorporeal life support equipment.
Claim 5
Dependent Claim
124 words
In a method of by-passing blood flow from the heart during open heart surgery, those steps which comprise: (a) circumferentially suturing the right atrial appendage, (b) surgically entering the right atrial appendage, (c) releasing the suture and inserting a venous return catheter into the right atrium of the heart and extending the catheter into the inferior vena cava, (d) providing first drainage openings in the catheter adjacent the end of the catheter in the inferior vena cava, (e) providing second drainage openings in the catheter spaced from the end to lie in the right atrium, and (f) utilizing a single tube in the catheter to carry the blood flow from the inferior vena cava and the right to atrium to extracorporeal life support equipment.
Claim 6
Dependent Claim
48 words
A method as defined in claim 3 in which a tubular obturator is inserted into said catheter to the first drainage openings to block the second drainage openings during initial insertion of the catheter, and removing the obturator after the second drainage openings have entered the right atrium.
Claim 7
Dependent Claim
100 words
A two-stage venous return catheter for insertion into the right atrium and inferior vena cava of the heart to drain blood of the patient to an extracorporeal life support machine which comprises: (a) a first diameter tube having an insertion end portion, (b) a rounded nose portion on the insertion end of said tube having circumferentially spaced elongate slots on the sides to admit fluid, (c) an enlarged second diameter portion on said tube spaced from the end portion, and (d) a juncture between said first and second diameter portions having elongate slots to admit fluid into said enlarged portion.
Claim 8
Dependent Claim
100 words
A two-stage venous return catheter for insertion into the right atrium and inferior vena cava of the heart to drain blood of the patient to an extracorporeal life support machine which comprises: (a) a first diameter tube having an insertion end portion, (b) a rounded nose portion on the insertion end of said tube having circumferentially spaced elongate slots on the sides to admit fluid, (c) an enlarged second diameter portion on said tube spaced from the end portion, and (d) a juncture between said first and second diameter portions having elongate slots to admit fluid into said enlarged portion.
Claim 9
Dependent Claim
27 words
A two-stage venous return catheter as defined in claim 5 in which said juncture portion tapers gradually from said first diameter portion to said second diameter portion.
Claim 10
Dependent Claim
140 words
A two-stage venous return catheter for insertion into the right atrium and inferior vena cava of the heart to drain blood of the patient to an extracorporeal life support machine which comprises: (a) a first diameter tube having an insertion end portion, (b) a rounded nose portion on the insertion end of said tube having circumferentially spaced elongate slots on the sides to admit fluid, (c) an enlarged second diameter portion on said tube spaced from the end portion, (d) a juncture between said first and second diameter portions having elongate slots to admit fluid into said enlarged portion, and (e) a removable obturator tube having a slip fit with the inner diameter of said first diameter tube to block flow through said slots in said juncture portion during insertion of said catheter into the atrium and inferior vena cava.
Claim 11
Dependent Claim
140 words
A two-stage venous return catheter for insertion into the right atrium and inferior vena cava of the heart to drain blood of the patient to an extracorporeal life support machine which comprises: (a) a first diameter tube having an insertion end portion, (b) a rounded nose portion on the insertion end of said tube having circumferentially spaced elongate slots on the sides to admit fluid, (c) an enlarged second diameter portion on said tube spaced from the end portion, (d) a juncture between said first and second diameter portions having elongate slots to admit fluid into said enlarged portion, and (e) a removable obturator tube having a slip fit with the inner diameter of said first diameter tube to block flow through said slots in said juncture portion during insertion of said catheter into the atrium and inferior vena cava.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |